bill nye the science guy is here to talk about climate change. hi, bill. >> greetings. >> greetings. >> carol. >> when you hear -- when you hear jan brewer, you say -- >> well, we as science educators have a lot of work to do. climate change is caused by people and there's new find where the ice sheets are melting faster than anybody expected. sea levels go up faster than anybody expected. so the populated areas like the east coast where sandy hit are going to be affected. people are going to have to move or take extraordinary steps, steps that people haven't taken before. >> some people say that they shouldn't rebuild along the shores. what do you think? >> well, i think the answer there is clearly it depends. it depends if you have the resources to build the infrastructure or the seabawall the gates, the channels to allow you to tolerate or absorb a storm like sandy. i remind everybody, sandy was not an especially big hurricane. if we get a bigger hurricane, and those sea levels a little higher, the effects are going to be bigger. and more cost